Extract product information from email receipt HTML
It depends on the data. If it is structured like form data, then you might not need AI at all &mdash; simple regular expression patterns might be fine. This would apply for example to address data. If you have the word street followed by a colon, followed by some text, it seems fairly obvious that this is the name of a street, and possibly also a house number.

If, however, you have free text, eg the answer to "describe any medical conditions you have", or "which companies have you worked at before?", then you might need to look at named entity extraction (NER) to identify names of medical conditions or companies.

So, some Natural Language Processing (NLP) and information extraction might be required apart from simple pattern matching.